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CA2428029A1 - Air injection for nitrogen oxide reduction and improved product quality - Google Patents

Air injection for nitrogen oxide reduction and improved product quality Download PDF

Info

Publication number
CA2428029A1
CA2428029A1 CA002428029A CA2428029A CA2428029A1 CA 2428029 A1 CA2428029 A1 CA 2428029A1 CA 002428029 A CA002428029 A CA 002428029A CA 2428029 A CA2428029 A CA 2428029A CA 2428029 A1 CA2428029 A1 CA 2428029A1
Authority
CA
Canada
Prior art keywords
rotary kiln
burner
nitrogen oxide
combustible fuel
combustion air
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002428029A
Other languages
French (fr)
Other versions
CA2428029C (en
Inventor
Kenneth L. Gardner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Metso Outotec USA Inc
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2428029A1 publication Critical patent/CA2428029A1/en
Application granted granted Critical
Publication of CA2428029C publication Critical patent/CA2428029C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/364—Avoiding environmental pollution during cement-manufacturing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories or equipment specially adapted for rotary-drum furnaces
    • F27B7/36—Arrangements of air or gas supply devices
    • F27B7/362—Introducing gas into the drum axially or through the wall
    • F27B2007/367—Introducing gas into the drum axially or through the wall transversally through the wall of the drum
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories or equipment specially adapted for rotary-drum furnaces
    • F27B7/2016—Arrangements of preheating devices for the charge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories or equipment specially adapted for rotary-drum furnaces
    • F27B7/42—Arrangement of controlling, monitoring, alarm or like devices

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Ecology (AREA)
  • Health & Medical Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Environmental Sciences (AREA)
  • Public Health (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Furnace Details (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)

Abstract

A calcining system (10) is operated in a substoichiometric mode for reducing nitrogen oxide generation and removing sulfur from materials (26) to be processed by creating an oxygen deficient atmosphere. The calcining system (10) includes a rotary kiln (14) rotating on a slightly inclined horizontal axis. The rotary kiln (14) has a feed end (22) introducing material (26) to be processed and a discharge end (24). A preheating/precalcining device (12) is positioned adjacent the feed end (22) such that the material (26) passes through the device (12) prior to entering the rotary kiln (14). A stationary hood (16) surrounds the discharge end (24). A burner (18) is supported by the stationary hood (16). The burner (18) introduces combustible fuel (38) and combustion air (40) into the rotary kiln (14) through the discharge end (24) and operates in a substoichiometric mode. At least on air nozzle (44) is located along the length of the rotary kiln (14). The air nozzle (44) injects combustion air (40) into the rotary kiln (14). The combustion air (40C) introduced by the air nozzle (44) completely combusts the combustible fuel (38) introduced by the burner (18) before the combustible fuel (38) exits the feed end (24).
CA002428029A 2000-11-20 2001-11-14 Air injection for nitrogen oxide reduction and improved product quality Expired - Fee Related CA2428029C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US25212100P 2000-11-20 2000-11-20
US60/252,121 2000-11-20
US09/918,269 US6474984B2 (en) 2000-11-20 2001-07-30 Air injection for nitrogen oxide reduction and improved product quality
US09/918,269 2001-07-30
PCT/US2001/043648 WO2002042701A1 (en) 2000-11-20 2001-11-14 Air injection for nitrogen oxide reduction and improved product quality

Publications (2)

Publication Number Publication Date
CA2428029A1 true CA2428029A1 (en) 2002-05-30
CA2428029C CA2428029C (en) 2009-05-26

Family

ID=26942061

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002428029A Expired - Fee Related CA2428029C (en) 2000-11-20 2001-11-14 Air injection for nitrogen oxide reduction and improved product quality

Country Status (5)

Country Link
US (1) US6474984B2 (en)
EP (1) EP1342042A4 (en)
AU (2) AU2002225689B2 (en)
CA (1) CA2428029C (en)
WO (1) WO2002042701A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7229281B2 (en) * 2000-09-11 2007-06-12 Cadence Environmental Energy, Inc. Method of mixing high temperature gases in mineral processing kilns
US6672865B2 (en) * 2000-09-11 2004-01-06 Cadence Enviromental Energy, Inc. Method of mixing high temperature gases in mineral processing kilns
DE10317307B4 (en) * 2003-04-14 2007-11-15 Rheinkalk Gmbh Device and method for burning limestone or dolomite
EP1993708A4 (en) * 2006-01-09 2010-10-13 Cadence Environmental Energy Method and apparatus for reducing nox emissions in rotary kilns by sncr
US9250018B2 (en) * 2009-11-06 2016-02-02 Fives North American Combustion, Inc. Apparatus and methods for achieving low NOx in a grate-kiln pelletizing furnace
CA2827930A1 (en) * 2011-03-16 2012-09-20 Hanwha Chemical Corporation Method for calcining electrode materials using a rotary kiln
US10046977B2 (en) 2013-07-05 2018-08-14 Outotec (Finland) Oy Process and plant for purifying red mud
CN103776262B (en) * 2014-01-28 2015-05-13 北京汉能清源科技有限公司 Real-time adjustment method and device for combustion conditions of rotary cement kiln
CN104634097A (en) * 2014-12-26 2015-05-20 中国建筑材料科学研究总院 Method and system for reducing nitrogen oxide in rotary kiln
CN111306933A (en) * 2020-02-24 2020-06-19 沈忠东 Staged combustion method for saving coal and reducing nitrogen during combustion of rotary cement kiln

Family Cites Families (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1121906A (en) 1914-04-25 1914-12-22 George F Downs Rotary furnace or kiln.
US2813822A (en) 1952-11-24 1957-11-19 Collier Carbon & Chemical Co Apparatus and method for calcining petroleum coke, coal and similar substances containing volatile combustible material
US3087790A (en) 1959-09-04 1963-04-30 Iowa State College Res Found Reductive decomposition of calcium sulfate
US3584850A (en) 1969-07-02 1971-06-15 United States Steel Corp Rotary kiln for shock sintering
US3633894A (en) 1970-01-12 1972-01-11 Bethlehem Steel Corp Method of making calcined minerals with reduced sulfur content
US3661370A (en) 1970-12-24 1972-05-09 Allis Chalmers Mfg Co Gas delivery manifold and processed material discharge assembly for rotary kiln
US3945624A (en) 1972-10-31 1976-03-23 Allis-Chalmers Corporation Reduction kiln having a controllable distribution system
US3794483A (en) 1972-10-31 1974-02-26 Allis Chalmers Process for delivering fuel and air to a rotary reduction kiln
US3847538A (en) 1972-10-31 1974-11-12 Allis Chalmers Reduction kiln having distribution system
US3751220A (en) 1972-11-24 1973-08-07 Allis Chalmers Fluid delivery system for rotary kiln
US3888621A (en) 1974-04-12 1975-06-10 Alcan Res & Dev Monitoring and controlling kiln operation in calcination of coke
US3966560A (en) 1974-05-06 1976-06-29 Alcan Research And Development Limited Method of calcining coke in a rotary kiln
US4065320A (en) 1975-05-13 1977-12-27 Allis-Chalmers Corporation System for handling high sulfur materials
US4053356A (en) 1975-08-08 1977-10-11 Westinghouse Electric Corporation Guide device
US4070149A (en) 1976-07-23 1978-01-24 Allis-Chalmers Corporation Controllable distribution system for rotary kiln
DE2719348C3 (en) 1977-04-30 1983-04-28 Metallgesellschaft Ag, 6000 Frankfurt Process for the production of quick lime with a low sulfur content
DE2719347B2 (en) 1977-04-30 1980-11-13 Metallgesellschaft Ag, 6000 Frankfurt Process for burning lime with solid carbonaceous fuel in a rotary kiln
US4340359A (en) 1979-02-01 1982-07-20 Holger Struckmann Apparatus and method of heating particulate material
US4273314A (en) 1979-06-22 1981-06-16 The Direct Reduction Corporation Direct reduction rotary kiln with improved air injection
US4330325A (en) 1979-06-22 1982-05-18 The Direct Reduction Corporation Direct reduction rotary kiln with improved air injection
DE3012866A1 (en) 1980-04-02 1981-10-08 Metallgesellschaft Ag, 6000 Frankfurt METHOD FOR BURNING LIME IN THE TURNTABLE
JPS5822881A (en) 1981-08-03 1983-02-10 川崎重工業株式会社 Rotary kiln and direct reduction method of metallic oxide using said kiln
US4402273A (en) 1982-03-01 1983-09-06 Ari Technologies, Inc. Reduction of nitrogen oxide emissions from calciners
US4389242A (en) 1982-03-18 1983-06-21 The Direct Reduction Corporation Interior arrangement for direct reduction rotary kilns and method
DE3545955C1 (en) * 1985-12-23 1987-07-09 Berlin Consult Gmbh Installation for low NOx solids combustion in cement manufacture
US5224433A (en) 1988-11-23 1993-07-06 Cadence Chemical Resources, Inc. Waste fuel delivery to long kilns
US5100314A (en) 1989-07-14 1992-03-31 Svedala Industries, Inc. Apparatus and process for direct reduction of materials in a kiln
US5076838A (en) 1989-07-14 1991-12-31 Svedala Industries, Inc. Process for direct reduction of materials in a kiln
DE3925475A1 (en) * 1989-08-01 1991-02-07 Krupp Polysius Ag METHOD FOR THE HEAT TREATMENT OF FINE GRAIN GOODS
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JPH07509688A (en) 1992-07-14 1995-10-26 アッシュ　グローブ　セメント　カンパニー Improved method for producing cement in long kilns
US5248330A (en) 1992-12-24 1993-09-28 Suedala, Inc. Method of pyroprocessing mineral ore material
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DE19854582B4 (en) * 1998-11-25 2007-11-22 Khd Humboldt Wedag Gmbh Process for the thermal treatment of cement raw meal
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Also Published As

Publication number Publication date
AU2568902A (en) 2002-06-03
WO2002042701A1 (en) 2002-05-30
CA2428029C (en) 2009-05-26
EP1342042A4 (en) 2006-12-06
US6474984B2 (en) 2002-11-05
US20020061489A1 (en) 2002-05-23
AU2002225689B2 (en) 2006-03-16
EP1342042A1 (en) 2003-09-10

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MKLA Lapsed

Effective date: 20171114